Signal transmission method, terminal device and network device

Abstract

A method for transmitting a signal, a terminal device, and a network device are provided, which can reduce a signal transmission delay. The method includes determining, by a terminal device, first indication information, where the first indication information is used for indicating an association relationship between a first uplink transmission opportunity used for uplink transmission and a first downlink transmission opportunity used for downlink transmission. The method also includes sending, by the terminal device, the first indication information to a network device in a time unit corresponding to the first uplink transmission opportunity.

What is claimed is: 
     
       1. A method for transmitting a signal, comprising:
 determining, by a terminal device, first indication information, wherein the first indication information is used for indicating channel access priority information and an association relationship between a first uplink transmission opportunity used for uplink transmission and a first downlink transmission opportunity used for downlink transmission, wherein the terminal device performs the uplink transmission through a second channel access type, the second channel access type is channel detection based on a contention window, and a size of the contention window is determined according to the channel access priority; and 
 sending, by the terminal device, the first indication information to a network device in a time unit corresponding to the first uplink transmission opportunity. 
 
     
     
       2. The method according to  claim 1 , wherein the association relationship comprises: association information between the first uplink transmission opportunity and the first downlink transmission opportunity, wherein the association information comprises at least one of a channel access type of the first uplink transmission opportunity, time interval information between the time unit of the first uplink transmission opportunity and the time unit of the first downlink transmission opportunity, the time unit of the first downlink transmission opportunity, and a channel access type of the first downlink transmission opportunity. 
     
     
       3. The method according to  claim 1 , wherein a time interval between the time unit of the first downlink transmission opportunity and the time unit of the first uplink transmission opportunity is a first time interval. 
     
     
       4. The method according to  claim 3 , wherein the first time interval is indicated by the first indication information, or is a predefined time interval. 
     
     
       5. A method for transmitting a signal, comprising:
 receiving, by a network device, first indication information sent by a terminal device, wherein the first indication information is used for indicating channel access priority information and an association relationship between a first uplink transmission opportunity used for uplink transmission and a first downlink transmission opportunity used for downlink transmission, wherein the uplink transmission is performed by the terminal device through a second channel access type, the second channel access type is channel detection based on a contention window, and a size of the contention window is determined according to the channel access priority; and 
 determining, by the network device according to the first indication information, the first downlink transmission opportunity used for downlink transmission. 
 
     
     
       6. The method according to  claim 5 , wherein the association relationship comprises: association information between the first uplink transmission opportunity and the first downlink transmission opportunity, wherein the association information comprises at least one of a channel access type of the first uplink transmission opportunity, time interval information between the time unit of the first uplink transmission opportunity and the time unit of the first downlink transmission opportunity, the time unit of the first downlink transmission opportunity, and a channel access type of the first downlink transmission opportunity. 
     
     
       7. The method according to  claim 5 , wherein a time interval between the time unit of the first downlink transmission opportunity and the time unit of the first uplink transmission opportunity is a first time interval. 
     
     
       8. The method according to  claim 7 , wherein the first time interval is indicated by the first indication information, or is a predefined time interval. 
     
     
       9. A terminal device, comprising a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to invoke and run the computer program stored in the memory, to perform:
 determining first indication information, wherein the first indication information is used for indicating channel access priority information and an association relationship between a first uplink transmission opportunity used for uplink transmission and a first downlink transmission opportunity used for downlink transmission, wherein the terminal device performs the uplink transmission through a second channel access type, the second channel access type is channel detection based on a contention window, and a size of the contention window is determined according to the channel access priority; and 
 sending the first indication information to a network device in a time unit corresponding to the first uplink transmission opportunity. 
 
     
     
       10. The terminal device according to  claim 9 , wherein the association relationship comprises: association information between the first uplink transmission opportunity and the first downlink transmission opportunity, wherein the association information comprises at least one of a channel access type of the first uplink transmission opportunity, time interval information between the time unit of the first uplink transmission opportunity and the time unit of the first downlink transmission opportunity, the time unit of the first downlink transmission opportunity, and a channel access type of the first downlink transmission opportunity. 
     
     
       11. The terminal device according to  claim 9 , wherein a time interval between the time unit of the first downlink transmission opportunity and the time unit of the first uplink transmission opportunity is a first time interval. 
     
     
       12. The terminal device according to  claim 11 , wherein the first time interval is indicated by the first indication information, or is a predefined time interval. 
     
     
       13. The terminal device according to  claim 9 , wherein the association relationship comprises: whether a time unit of the first uplink transmission opportunity comprises a time unit of the first downlink transmission opportunity. 
     
     
       14. The terminal device according to  claim 9 , wherein the processor is further configured to perform:
 sending a message 3 (MSG3) used for random access to the network device, the MSG3 carrying the first indication information. 
 
     
     
       15. The terminal device according to  claim 9 , wherein the processor is further configured to perform:
 receiving second indication information sent by the network device, wherein the second indication information is used for indicating the association relationship; and 
 determining the second indication information as the first indication information. 
 
     
     
       16. The terminal device according to  claim 15 , wherein the processor is further configured to perform:
 receiving the second indication information that is sent by the network device through a physical downlink control channel (PDCCH) order. 
 
     
     
       17. A network device, comprising a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to invoke and run the computer program stored in the memory, to perform steps of the method according to  claim 5 . 
     
     
       18. The network device according to  claim 17 , wherein the association relationship comprises: association information between the first uplink transmission opportunity and the first downlink transmission opportunity, wherein the association information comprises at least one of a channel access type of the first uplink transmission opportunity, time interval information between the time unit of the first uplink transmission opportunity and the time unit of the first downlink transmission opportunity, the time unit of the first downlink transmission opportunity, and a channel access type of the first downlink transmission opportunity. 
     
     
       19. The network device according to  claim 17 , wherein a time interval between the time unit of the first downlink transmission opportunity and the time unit of the first uplink transmission opportunity is a first time interval. 
     
     
       20. The network device according to  claim 19 , wherein the first time interval is indicated by the first indication information, or is a predefined time interval.